Novel gene rearrangement in the mitochondrial genome of Pisidia
serratifrons (Anomura: Galatheoidea: Porcellanidae) and phylogenetic
associations in Anomura
Abstract
To improve the taxonomy and systematics of Porcellanidae within the
evolution of Anomura, we describe the complete mitochondrial genomes
(mitogenomes) sequence of Pisidia serratifrons, which is 15,344 bp in
size, contains the entire set of 37 genes, and has an AT-rich region.
The genome composition showed a high AT content of the mitogenomes was
74.29%, and exhibited a positive AT-skew (0.017) and a negative GC-skew
(-0.246). Compared with the pan-crustacean ground pattern, at least five
gene clusters (or genes) are significantly different with the typical
genes, involving eleven tRNA genes and four PCGs, and the tandem
duplication/random loss and recombination models were used to explain
the observed large-scale gene rearrangements. The phylogenetic results
showed that all Porcellanidae species clustered together as a group with
well supported. Most Anomura superfamilies were found to be
monophyletic, except Paguroidea. In general, the results obtained in
this study will contribute to a better understanding of gene
rearrangements in Porcellanidae mitogenomes and provide new insights
into the phylogeny of Anomura.